title: [The role of resistance to C active protein (R-APC) in a pediatric stroke].
abstract: BACKGROUND
  Activated protein C resistance is a recently identified thrombophylic state which results from a mutation in the factor V gene and has been shown to be an important risk factor for peripheral venous thrombosis. We report a case of paediatric stroke in whom we have identified APC resistance.
  
  
  METHODS
  A boy presented acutely at the age of 6 years with a severe right sided headache, vomiting, unsteadiness and drowsiness which worsened over a period of 40 hours. Prior to this episode, he was neurologically and developmentally normal except for occasional headaches. CT showed low attenuation in the left cerebellar hemisphere, and occipital lobe associated with acute hydrocephalus. Excision biopsy of the left cerebellar cortex revealed inflammation and possible infarction. Although he remained in a 'locked-in' state with a flaccid quadriparesis for six months, he improved and was left with a left side hemiplegia, multiple cranial nerve palsies and a visual field defect. He represented at the age of thirteen years with transient ischaemic attacks and was found be heterozygous for the factor V Leiden mutation. Since he has been warfarinised, his symptoms have improved.
  
  
  CONCLUSIONS
  Although cerebellar stroke in childhood is rare, it has been underdiagnosed in the past. As recurrence is common, patients should be fully investigated and followed up long term. Screening for new factor such as APC-resistance is recommended.
authors.affiliation: Servei de Neuropediatria, Hospital Clínic-Hospital San Joan de Déu, Universitat de Barcelona, España.
authors.forename: E
authors.initials: E
authors.lastname: Cardo
authors.forename: J
authors.initials: J
authors.lastname: Campistol
authors.forename: F
authors.initials: F
authors.lastname: Kirkham
mesh_terms: D000293:Adolescent; D000925:Anticoagulants / Q000627:therapeutic use; D002531:Cerebellum / Q000473:pathology; D002544:Cerebral Infarction / Q000150:complications / Q000175:diagnosis* / Q000188:drug therapy / Q000235:genetics; D003388:Cranial Fossa, Posterior; D004569:Electroencephalography; D005165:Factor V / Q000235:genetics; D006261:Headache / Q000209:etiology; D006801:Humans; D006849:Hydrocephalus / Q000150:complications / Q000473:pathology; D008297:Male; D017354:Point Mutation; D011486:Protein C / Q000235:genetics; D012008:Recurrence; D014057:Tomography, X-Ray Computed; D014859:Warfarin / Q000627:therapeutic use
chemical_list: D000925:Anticoagulants; D011486:Protein C; D014859:Warfarin; D005165:Factor V
vernacular_title: Papel de la resistencia a la proteína C activada (R-PCA) en el ictus pediátrico.